Congress may not suspend unless a national crisis requires it.
a. bills of attainder
b. the bill of rights
c. ex post facto laws
d. habeas corpus

abraham lincoln was the president of usa and he had asked the audience to make a pledge on equality.

his pledge was:

“it is my earnest desire to know the will of the providence.”

lincoln also had hatred for people who condoned and practiced slavery and so he pledged:

""and if i can learnt what it is i can do it"" this is another pledge by abraham to reassure the congregation on how to deal with the providence will.

explanation:

hope this !

the right answer is the constitution